The 55K6A is the Russian-service command-post component associated with the S-400 Triumf air-defense system. Open export literature describes the closely related 55K6E combat control post as the node that processes radar information, distributes targets, issues target designations, and links S-400 batteries with higher or neighboring command systems. In Ukraine, open-source loss tracking and defense reporting identify a Russian 55K6A command post destroyed in Kherson Oblast in May 2023, making the component useful as a separately tracked command-and-control target rather than only as part of the broader S-400 launcher family.
WarSpotting records a Russian 55K6A command post for the 40R6 S-400 Triumf destroyed in Kherson Oblast on 2023-05-20; Army Recognition separately summarized open-source S-400 component losses including one 55K6A command post.
Role detailsThe 55K6A/55K6E command-post line is documented as part of the S-400 command-and-control layer rather than as a launcher or interceptor.
| Compatible item | Item type | Compatibility evidence |
|---|---|---|
 | Long-range surface-to-air missile system | Rosoboronexport describes the 55K6E combat control post as controlling combat operations of the S-400 98Zh6E air-defense complex, processing radar information, distributing targets, and issuing target designations. |
The 55K6A/55K6E sits in the control layer of the S-400 system. It is not an interceptor launcher; its value comes from taking air-picture data from sensors, assigning targets, and connecting the battery or division with adjacent and higher command systems.
Rosoboronexport states that the 91N6E radar provides radar information to the 55K6E combat control post.
The same source describes target distribution and target-designation issue as core 55K6E combat-control tasks.
Air Power Australia describes 55K6/55K6E command posts as S-400 battery command posts with interfaces and software for S-400 Triumf radar systems and broader integrated-air-defense links.
The direct 55K6A conflict row is based on identified Russian component-loss records in Kherson Oblast, not on every S-400 deployment in the war.
Sources: S-400 Triumph Rosoboronexport profile; Air Power Australia air defence command posts; WarSpotting 55K6A loss record.
Deagel lists the 55K6 command post with an initial operational capability date of 2007-04-28 and associates the 55K6E with each S-400 battalion or system.
Sources: Deagel 55K6 profile
WarSpotting records a Russian 55K6A command post for the 40R6 S-400 Triumf destroyed in Kherson Oblast.
Sources: WarSpotting 55K6A loss record
Army Recognition cited open-source reporting that included one 55K6A command post among Russian S-400 components destroyed since the start of the full-scale war.
Sources: Army Recognition 55K6A S-400 component loss report
